DFRobot FireBeetle 2 ESP32-E
Compact ESP32-E IoT microcontroller with WiFi 802.11 b/g/n, Bluetooth 4.2, 18 digital I/O, 11 analog inputs, 7 touch pins, 2 DACs, onboard WS2812 RGB LED, GDI display interface, and lithium battery charging in a tiny 25.4x60mm form factor.
$8.90
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Specifications
Components
Espressif ESP32-WROOM-32E with Xtensa LX6 dual-core at 240MHz, 520KB SRAM, 4MB flash, WiFi 802.11 b/g/n, Bluetooth 4.2 BR/EDR + BLE.
WS2812 individually addressable RGB LED on GPIO5 for status indication and visual feedback.
GPIO Map
Overview
The DFRobot FireBeetle 2 ESP32-E (SKU: DFR0654) is a compact IoT development board built around the ESP32-WROOM-32E module. Running a Xtensa LX6 dual-core processor at 240MHz with 520KB SRAM and 4MB flash, it delivers strong processing power for WiFi and Bluetooth IoT projects in a tiny 25.4 x 60mm footprint.
The board exposes 18 digital I/O pins, 11 analog inputs across ADC1 and ADC2, 7 capacitive touch sensors, 2 DAC outputs, and 16 LED PWM channels. Communication interfaces include SPI, I2C, dual UART, and I2S. An onboard WS2812 addressable RGB LED on GPIO5 and a GDI display connector make it easy to add visual feedback without external wiring.
Power management is a strong point -- the FireBeetle 2 ESP32-E features an onboard lithium battery charging circuit with a PH2.0 connector for 3.7V LiPo batteries, and a low-power solder jumper pad that reduces static consumption by 500 microamps when cut. The board accepts power via USB-C or the VCC pin at 5V. Stamp-hole pads around the board edges allow direct soldering onto custom PCBs for production deployments.
Use Cases
6IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Smart Home
Home automation devices for controlling lighting, climate, security, and appliances.
Environmental Monitoring
Monitoring environmental conditions like temperature, humidity, air quality, and weather data using remote sensors.
Battery Powered Sensor Node
Low-power sensor nodes running on battery for wireless data collection and monitoring.
Weather Display
A dedicated screen that shows weather information including current conditions, temperature, humidity, pressure, and multi-day forecasts.
Plant Monitoring
Monitoring soil moisture, temperature, humidity, and light to automate plant care and watering.
Where to Buy
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